gpiolib: Fix spelling of 'successful'

Remove extra 'l' in "successfull".
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/devres.c

@@ -136,7 +136,7 @@ EXPORT_SYMBOL(devm_gpiod_get_index);
  * GPIO descriptors returned from this function are automatically disposed on
  * driver detach.
  *
- * On successfull request the GPIO pin is configured in accordance with
+ * On successful request the GPIO pin is configured in accordance with
  * provided @flags.
  */
 struct gpio_desc *devm_fwnode_get_index_gpiod_from_child(struct device *dev,

drivers/gpio/gpiolib.c

@@ -3326,7 +3326,7 @@ EXPORT_SYMBOL_GPL(gpiod_get_index);
  * underlying firmware interface and then makes sure that the GPIO
  * descriptor is requested before it is returned to the caller.
  *
- * On successfull request the GPIO pin is configured in accordance with
+ * On successful request the GPIO pin is configured in accordance with
  * provided @dflags.
  *
  * In case of error an ERR_PTR() is returned.